刘敉共,王浩,林大能,李强
LIU Mi-gong,WANG Hao,LIN Da-neng,LI Qiang

• 1:湖南科技大学资源环境与安全工程学院

摘要(Abstract)：

为了改善爆破破岩效果，减少爆破的有害效应，并减少岩石大块率的产生，采用ANSYS/LS-DYNA模拟水介质所处的不同位置以及不同不耦合系数对爆破效果的影响，通过优化装药结构以期找到合理的装药结构和较优的不耦合系数。基于显式动力学有限元软件ANSYS/LS-DYNA建立三维数值计算模型，以爆炸应力云图、峰值拉应力分布为评判依据，对轴向不耦合装药位置、轴向不耦合系数等因素进行了对比分析。研究表明：轴向不耦合装药位置的不同，对最大拉应力值的影响不同，虽然水介质在中部和在顶部的装药结构在孔口段处的最大拉应力值远大于岩石的抗拉强度，但综合考虑孔底岩石所受的损伤效应，得出水介质在两端的装药结构能量分布较为均匀，孔底岩石受的损伤大大减少，减少对未爆岩体的损伤和扰动；以最大拉应力值作为爆破效果的评判标准，在不耦合系数1.3～1.8之间，峰值拉应力存在极大值，即对应一个最优的不耦合系数，同时较耦合装药结构相比，减少了粉层和有毒有害气体的生成。
In order to improve the effect of blasting rock, reduce the harmful effects of blasting, and reduce the generation of rock mass rate, ANSYS/LS-DYNA is used to simulate the influence of different positions of the water medium and different decoupling ratio on the blasting effect, and by optimizing the charge structure to find a reasonable charge structure and a better decoupling ratio. Based on the explicit dynamics finite element software ANSYS/LS-DYNA, a three-dimensional numerical calculation model was established. Based on the explosion stress nephogram and the peak distribution of tensile stress, the axial decoupling charge position and the axial decoupling ratio were compared and analyzed.Studies have shown that the difference in the position of the axially decoupled charge has different effects on the maximum tensile stress value, although the maximum tensile stress value at the orifice section of the charge structure with the water medium at the middle and the water medium at the top is much greater than the tensile strength of the rock. But comprehensively considering the damage effect of the rock at the bottom of the bore, it is concluded that the energy distribution of the charge structure of the water medium at both ends is relatively uniform. The damage to the rock at the bottom of the hole is greatly reduced, the damage and disturbance to the unexploded rock mass are reduced. Taking the maximum tensile stress value as the evaluation standard of blasting effect, the maximum value of tensile stress peak value exists between the decoupling ratio 1.3～1.8, which corresponds to an optimal decoupling ratio. At the same time, compared with the coupled charge structure, it is reduced to powder layer and the generation of toxic and harmful gases.

关键词(KeyWords)： 数值模拟;轴向不耦合装药结构;轴向不耦合系数;最大拉应力;爆炸效果
numerical simulation;axial decoupled charging structure;axial decoupling ratio;maximum tensile stress;blasting effect

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 刘敉共,王浩,林大能,李强
LIU Mi-gong,WANG Hao,LIN Da-neng,LI Qiang

DOI: 10.19931/j.EB.20210133

参考文献(References)：

• [1] 种玉配，熊炎林，齐燕军.轴向不耦合装药结构形式优化仿真研究[J].工程爆破，2018,24(2):1-7.ZHONG Y P,XIONG Y L,QI Y J.Numerical simulation of peak tensile stress and damage effect of eccentric uncoupled charge [J].Engineering Blasting,2018,24(2):1-7.
• [2] 唐明渊，康强，余红兵.轴向不耦合装药爆破应用研究[J].采矿技术，2017,17(4):78-80.TANG M Y,KANG Q,YU H B.Study on application of axial decoupling charge blasting[J].Mining Technology,2017,17(4);78-80.
• [3] 史维升.不耦合装药条件下岩石爆破的理论研究和数值模拟[D].武汉：武汉科技大学，2004.SHI W S.Numerical simulation and theory study of rock blasting without interaction charge[D].Wuhan:Wuhan University of Science and Technology,2004.
• [4] HYONGDOO J,DAVID H,KO Y H,et al.Effects of water deck on rock blasting performance[J].International Journal of Rock Mechanics and Mining Sciences,2018:112.
• [5] XIA W J,LU W,LI R,et al.Effect of water-decked blasting on rock fragmentation energy[J].Shock and Vibration,2020:1-11.
• [6] ZHU H B,LU W B,WU L.Air-Decking technique in bench blasting[J].Journal of China University of Mining & Technology(English edition),2006(2):184-188.
• [7] 杨跃宗，邵珠山，熊小锋，等.岩石爆破中径向和轴向不耦合装药的对比分析[J].爆破，2018,35(4):26-33,146.YANG Y Z,SHAO Z S,XIONG X F,et al.Comparison of radial and axial uncoupled charge in rock blasting[J].Blasting,2018,35(4):26-33,146.
• [8] 孙丽.空气间隔轴向不耦合装药预裂爆破数值模拟研究[D].长沙：中南大学，2012.SUN L.Numerical simulation research of presplit blasting of axial decouping with air-desk charge[D].Changsha:Central South University,2012.
• [9] 韩雪靖，王宝，罗瑞.紫金山地下采场深孔爆破轴向不耦合系数的研究[J].金属矿山，2018(9):63-68.HAN X J,WANG B,LUO R.Study on axial uncoupling coefficient of deep hole blasting in Zijinshan underground stope[J].Metal Mine,2018(9):63-68.
• [10] FU J G,QIN W S,LI Y R.Experimental study of regularity of effect of bottom air column length on cut blasting[C]//In:Theory and Practice of Energetic Materials.Beijing:Science Press,2003.1 059-1 062.
• [11] 王立川，张学民，马明正，等.隧道爆破水介质轴向不耦合装药振动规律三维数值模拟研究[J].现代隧道技术，2018,55(2):96-102,120.WANG L C,ZHANG X M,MA M Z,et al.3D numerical simulation of tunnel blasting vibration laws under axial uncoupled charge with water medium[J].Modern Tunneling Technology,2018,55(2):96-102,120.
• [12] 胡银林.水介质对预裂爆破效果影响的试验研究[D].鞍山：辽宁科技大学，2018.HU Y L.Experimental study on the effectof pre-splitting blasting of water medium [D].Anshan:University of Science and Technology Liaoning,2018.
• [13] 张迅.光面爆破不耦合装药参数优化的试验研究[J].工程爆破，2019,25(6):27-31.ZHANG X.Experimental study on parameter optimization of deoupled charge in smooth blasting[J].Engineering Blasting,2019,25(6):27-31.
• [14] 杨跃宗.新林隧道光面爆破参数优化研究及工程应用[D].西安：西安建筑科技大学，2018.YANG Y Z.Research into the parameter optimization of smooth blasting and application in Xinlin tunnel[D].Xi'an:Xi 'an University of Architecture and Technology,2018.
• [15] 时党勇，李裕春，张胜民.基于ANSYS/LS-DYNA 8.1进行显式动力分析[M].北京：清华大学出版社，2005.SHI D Y,LI Y C,ZHANG S M.Explicit dynamic analysis was carried out based on ANSYS/LS-DYNA 8.1[M].Beijing:Tsinghua University Press,2005.
• [16] 郑祥滨，璩世杰，范利华，等.单螺旋空孔直眼掏槽成腔过程数值模拟研究[J].岩土力学，2008(9):2 589-2 594.ZHENG X B,QU S J,FAN L H,et al.Numerical simulation of cavity forming process by single helix parallel hole cut blasting[J].Rock and Soil Mechanics,2008(9):2 589-2 594.
• [17] 谢理想，卢文波，姜清辉，等.深部岩体在掏槽爆破过程中的损伤演化机制[J].中南大学学报(自然科学版),2017,48(5):1 252-1 260.XIE L X,LU W B,JIANG Q H,et al.Damage evolution mechanism of deep rock mass in process of cut blasting [J].Journal of Central South University (Natural science),2017,48(5):1 252-1 260.
• [18] 宗琦，程兵，汪海波.偏心不耦合装药拉应力峰值与损伤效应数值模拟[J].爆破，2019,36(3):76-83.ZONG Q,CHENG B,WANG H B.Numerical simulation of pressure on borehole wall and damage effect with eccentric decouple charge[J].Blasting,2019,36(3):76-83.
• [19] 王浩，刘敉共，林大能，等.浅孔爆破应力场的水药组合结构效应[J].采矿技术，2020,20(6):134-136,139.WANG H,LIU M G,LIN D N,et al.Effect of combined structure of water and drug on stress field of shallow hole blasting[J].Mining Technology,2020,20(6):134-136,139.
• [20] 李志鹏，吴顺川，严琼，等.瓦斯剧烈爆炸隧道衬砌损伤数值模拟与机理分析[J].煤炭学报，2018,43(S1):167-177.LI Z P,WU S C,YAN Q,et al.Numerical simulation and mechanism analysis of tunnel lining damage caused by severe gas explosion [J].Journal of China Coal Society,2018,43(S1):167-177.
• [21] 张长亮，涂维，罗志光，等.裂隙岩体固-水-气三相不耦合装药爆破数值模拟分析[J].公路交通科技，2017,34(4):58-65.ZHANG C L,TU W,LUO Z G,et al.Numeric simulation analysis of fractured rock mass blasting with solid-water-vapor decoupling charge [J].Journal of Highway Communication Technology,2017,34(4):58-65.
• [22] HASHEMI S K,BRADFORD M A.Numerical simulation of free-air explosion using LS-DYNA[C]//Applied Mechanics and Materials,2014,553:780-785.
• [23] SHI Y,LI Z,HAO H.Mesh size effect in numerical simulation of blast wave propagation and interaction with structures[J].Transactions of Tianjin University,2008,14(6):396-402.
• [24] 高轩能，刘颖，王书鹏.基于LS-DYNA的大空间柱壳结构爆炸波压力场分析[J].振动与冲击，2011,30(9):70-75.GAO X N,LIU Y,WANG S P.Analysis of explosion wave pressure field of large space cylindrical shell structure based on LS-DYNA[J].Journal of Vibration and Shock,2011,30(9):70-75.
• [25] 任朋飞，王显会，张进成，等.刚性地面爆炸冲击场仿真与试验研究[J].科学技术与工程，2017,17(21):30-36.REN P F,WANG X H,ZHANG J C,et al.Simulation and experimental study on explosive shock field on rigid ground[J].Science Technology and Engineering,2017,17(21):30-36.
• [26] 崔莹，赵均海，张常光，等.基于爆炸试验的冲击波传播网格划分效应研究[EB/OL].[2013-10-31].http:/ /www.Paper.edu.cn/releasepaper /content /201310-435.CUI Y,ZHAO J H,ZHANG C G,et al.Study on meshing effect of shock wave propagation based on explosion test[EB/OL].[2013-10-31].http://www.Paper.edu.cn/releasepaper/content/201310-435.
• [27] 杜欣新，毛毳.网格划分影响二维爆炸冲击波数值模拟精度的研究[J].天津城市建设学院学报，2013,19(4):277-279.DU X X,MAO S.The influence research of the mesh size on the numerical simulation accuracy of 2-D blast wave[J].Journal of Tianjin Urban Construction Institute,2013,19(4):277-279.
• [28] 白金泽.LS-DYNA3D理论基础与实例分析[M].北京：科学出版社，2005.BAI J Z.LS-DYNA3D theory and case analysis[M].Beijing:Science Press,2005.
• [29] 汪振，吴茂林，孙玉松.多介质ALE方法流固耦合影响因素及参数分析[J].计算机仿真，2021,38(2):18-23.WANG Z,WU M L,SUN Y S.Influencing factors and parameters of fluid-solid coupling in multi-medium ALE method[J].Computer Simulatio,2021,38(2):18-23.